moving get_metada service

  - embedding and rerank models will not have get_metada service

llama_ros/src/llama_ros/llama_node.cpp

@@ -81,12 +81,6 @@ LlamaNode::on_activate(const rclcpp_lifecycle::State &) {
   // create llama
   this->create_llama();
 
-  // get metadata service
-  this->get_metadata_service_ =
-      this->create_service<llama_msgs::srv::GetMetadata>(
-          "get_metadata",
-          std::bind(&LlamaNode::get_metadata_service_callback, this, _1, _2));
-
   // embeddings service
   if (this->llama->is_embedding() && !this->llama->is_reranking()) {
     this->generate_embeddings_service_ =
@@ -107,6 +101,12 @@ LlamaNode::on_activate(const rclcpp_lifecycle::State &) {
 
   // completion services and action
   if (!this->llama->is_embedding() && !this->llama->is_reranking()) {
+    // get metadata service
+    this->get_metadata_service_ =
+        this->create_service<llama_msgs::srv::GetMetadata>(
+            "get_metadata",
+            std::bind(&LlamaNode::get_metadata_service_callback, this, _1, _2));
+
     this->tokenize_service_ = this->create_service<llama_msgs::srv::Tokenize>(
         "tokenize",
         std::bind(&LlamaNode::tokenize_service_callback, this, _1, _2));
@@ -152,9 +152,6 @@ LlamaNode::on_deactivate(const rclcpp_lifecycle::State &) {
 
   this->destroy_llama();
 
-  this->get_metadata_service_.reset();
-  this->get_metadata_service_ = nullptr;
-
   if (this->llama->is_embedding() && !this->llama->is_reranking()) {
     this->generate_embeddings_service_.reset();
     this->generate_embeddings_service_ = nullptr;
@@ -166,6 +163,9 @@ LlamaNode::on_deactivate(const rclcpp_lifecycle::State &) {
   }
 
   if (!this->llama->is_embedding() && !this->llama->is_reranking()) {
+    this->get_metadata_service_.reset();
+    this->get_metadata_service_ = nullptr;
+
     this->tokenize_service_.reset();
     this->tokenize_service_ = nullptr;